between the grass carp and the koi, plants do not stand much of a chance, I actually built plant cages in an attempt to even have a couple isolated patches of vegitaion. I am assuming they will eat or tear up just about any thing vegitative. They even elimiated the cat tails growing in one corner of the pond by eating or uprooting the roots.
I will try to not carry any water from that pond, I know the pond I am going to get them from is pretty bare as far as weeds, pretty much just a sand bowl.
